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. they are studying the evolution of specialization as they uncover details of ancient economies around the world. in the maya city of copan, a jeweler fashioned rare shell and jade for his powerful lord. in mexico, living artisans echo the economy of a vanished civilization. and in teotihuacan, evidence of mass production has now been unearthed. tiny faces of clay reflect the men and women who made them a thousand years ago. on the other side of the world, in the ancient roman city of ostia, huge merchant ships were part of an economy much like our own. and today, the tanners of morocco still practice their ancient craft, living proof that economies have evolved out of the past. everyone who has ever lived has been part of an economic system. iel bote grande...mil pesos! economic systems are simply the ways people produce, distribute and consume things -- everything and anything, from tortillas to stocks and bonds. for 10,000, 10,000 an eighth. today, as in the past, economic systems lie at the heart of how a society is organized. archaeologists search for these systems because they believe econ
the equator, its elevation in the andes gives it a mild climate. and you have aibranty and somtourist economy.ings on the surrounding hillsides, adequate rainfall and fertile volcanic soils sustain agriculture. but the same natural forces that sustain the economy are also a source of danger. hoping to avoid a agedy, geographer patty mothes maps and monitors several volcanoes for ecuador's geophysica institute,nclu tunguhua. she is looking for any changes that might signal an eruption. moes and onofhese ways thate hat is to put a prism that's highly reflective, or a number of prisms up on the flanks of the volcano, and then, shooting with this very high-powered laser beam... narrator: the beams reflect off the prisms and back to patty's measuring device. it canetsubthanges in t shapef the mountain, changes that may forecast an eruption and save lives. their concern is based on history. inside a church, a mural recalls a deadly eruption in 1773. it happened again in 1886 and 1918. so why do people live in such a dangerous place? some people simply cannot afford to move, due to limited economic means
with the level of economy, it's not that great. it's not that i cannot go back home, back to vietnam, but i don't-- i do not really want to go back right now, at this time. mostly because i feel too alienated... from the culture right now. i am no longer pure vietnamese. i don't really fit there anymore. now i think in english, and my vocabulary, even though i'm mexican... and i've been living in my country for 25 years and only 10 here, my vocabulary now is mostly in english. so when i go there the communication gets in the middle, because of my way of thinking now and my way of communicating with other people. i'm very used to the american way, in terms of making a living... and the business ways in the united states. and it would be very difficult for me to just move over there... and kind of do what i'm doing now. but being an immigrant is also a process of adjusting. so i would just have to adjust back to certain ways. i have a late meeting this afternoon. can you pick the baby up from the sitter's ? of course. i couldn't sleep last night. neither could i. i don't know what to say, jamal.
and economy change toncourage family planning? aturrent rates will they access to birth control? the cwillow doubletion in just 24 yea, compared with 120 years for the u.s. economics, religion and the lack of bih control mean tt fertility rates remain as high as they haveeen for centuries. at the other end of life, however, something has changed thsalu-aspanish foal.cal clinif and keptopulatiohigh. for geographers likeeorge lovell e goodews is tempe byace ground sos ponde t outlook for doña magdale's he can only hope for a change in the balance of people to the land that supports them. the inequitiesesult from three cycles of conquest, lasting over 500 years. as maya pulation continues to grow, a ck of ndin guatemala. sus greasoci ueaval captioned by media access group at wgbh lastaccess.wgbh.orgars.
between species; markets and economies linked together by the flow of capital. in some sense, we could argue that everything on the planet, both living and inanimate, is part of one huge, beautiful, but complicated network. what do all these networks have in common? abstractly, they are comprised of intersections, or points, that we call nodes, or vertices, that are connected by lines, or paths, that we call edges. now, on this map, for example, cities are nodes and highways are edges. any real-life network can look very messy. in order to get to the heart of a network, mathematicians strip away all the particulars, leaving only the essence, the underlying mathematical graph. it was just such a process of reducing a map to its basic components that laid the foundation for graph theory, network theory, and topology, three of the most bountiful areas of mathematics. and it all began with seven bridges when one of the greatest mathematicians of all time, leonhard euler, turned his attention to the famous puzzle of the konigsberg bridges in prussia in 1732. now, konigsberg is split by the
Search Results 0 to 4 of about 5